With Intercom Messages, you can send Emails, Chats, Posts and Mobile push messages to engage your customers. There are two ways to send them: with a ‘Dynamic’ audience, or a ‘Fixed’ audience.
Dynamic audience means the message will send to everyone who matches the filters now and anyone who matches the filters in the future.
Fixed audience means the message will only send to people who match your audience filters now.
Where do I choose how a message sends?
When composing a message, under "Audience" choose "Dynamic" or "Fixed":

Note: You can’t change the way a message will send after it has been set live.
Dynamic audiences are great for:
Onboarding new customers
You can trigger messages to send at key moments during onboarding. For example, you can let customers know when they should use an important feature for the first time, or contact them right before their trial ends. Check out this guide to create your first onboarding campaign.
Helping customers at key moments
For example, after customers take a specific action in your product, you can trigger an auto message that guides them to take the next logical step. Learn how to anticipate your customer’s questions.
How many times do dynamic messages send?
Messages with a dynamic audience won’t send to a given user more than once unless they're triggered by an event or you use a company variable in your message.
Dynamic Chat and Post messages send when:
The customer logs in or visits your site.
They match the audience filters you’ve set.
During the scheduled delivery times.
Important: If you use a “Last seen” rule in your audience filters, we send any messages based on that rule before the ‘Last seen’ value is updated with the login.
An email message with a dynamic audience sends when:
You first set the message live.
Users match your audience rules. (The audience filters are checked every hour.)
During the delivery times you set.
Fixed audiences are great for:
Announcing a feature or update
These work well for time-sensitive announcements like when you want to launch a feature. Here’s the best way to announce your new features.
Reaching out to a high profile customer now
For example, when a high profile user signs up, you might want to reach out and offer the chance to chat, or to let them know that they qualify for your VIP support.
User testing a message
If you're sending a mail out to 100s of 1000s of users, you’ll really benefit from trying it out with 20, or 50 users first, and seeing what the reaction is like.
Send a one-off message to a single person
To send a one-off message to a particular customer, head to their profile and click ‘Send a message’ in the top right corner:
Or, to send a one-off message from the Intercom conversations mobile app:
Open a customer’s profile
Click the message icon in the top right corner
Compose and send your message.
Note: The message is sent as a chat by default, but you can choose to send it by email instead.
Where are all my Fixed and Dynamic messages?
To see all your Dynamic or Fixed messages in one place, use this filter on the messages list, under Outbound:

What’s next?
Learn whether you should send your message by email, chat, post or push message.
Decide whether to send a post or chat and how to deliver it to your customers.